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Re: {minutes} TTWG Meeting 7/8/2014

From: Nigel Megitt <nigel.megitt@bbc.co.uk>
Date: Fri, 8 Aug 2014 09:07:52 +0000
To: Glenn Adams <glenn@skynav.com>
CC: Timed Text Working Group <public-tt@w3.org>
Message-ID: <D00A5074.F84D%nigel.megitt@bbc.co.uk>
Thanks Glenn


   nigel: I've updated Change Proposal 25 in relation to
   issue-288.

   [25]https://www.w3.org/wiki/TTML/changeProposal025#Summary

     [25] https://www.w3.org/wiki/TTML/changeProposal025#Summary

   nigel: I've proposed an addition to the previous work, to allow
   TTML documents with identifiers on elements to be combined with
   specified rules for uniqueness across the group.
   ... This is at the syntactic level using knowledge of TTML,
   i.e. it's not a generalisable XML approach.
   ... For example identified descendants of <head> must remain
   identical across the set, to a deep level excepting metadata,
   ... whereas identified descendants of <body> can be combined
   additively and therefore don't require strict identity.

>I haven't read the proposal yet, but if it suggests doing this with xml:id, then I will likely oppose it. If there is to be a linkage mechanism, it should be done using a new ttm: attribute.

I look forward to your thoughts when you’ve read the proposal. It doesn’t suggest using xml:id for the group identifier, nor does it in any way dilute the existing semantics for xml:id – it extends the scope of uniqueness from a single document to a group of documents and provides a mechanism for combining the documents in the group together such that the resulting document is conformant while preserving ids; if this is not possible because those extended xml:id uniqueness rules have not been followed within the group then the combination process exits with an error.



From: Glenn Adams <glenn@skynav.com<mailto:glenn@skynav.com>>
Date: Thursday, 7 August 2014 17:54
To: Nigel Megitt <nigel.megitt@bbc.co.uk<mailto:nigel.megitt@bbc.co.uk>>
Cc: Timed Text Working Group <public-tt@w3.org<mailto:public-tt@w3.org>>
Subject: Re: {minutes} TTWG Meeting 7/8/2014


   nigel: I've updated Change Proposal 25 in relation to
   issue-288.

   [25]https://www.w3.org/wiki/TTML/changeProposal025#Summary

     [25] https://www.w3.org/wiki/TTML/changeProposal025#Summary

   nigel: I've proposed an addition to the previous work, to allow
   TTML documents with identifiers on elements to be combined with
   specified rules for uniqueness across the group.
   ... This is at the syntactic level using knowledge of TTML,
   i.e. it's not a generalisable XML approach.
   ... For example identified descendants of <head> must remain
   identical across the set, to a deep level excepting metadata,
   ... whereas identified descendants of <body> can be combined
   additively and therefore don't require strict identity.

I haven't read the proposal yet, but if it suggests doing this with xml:id, then I will likely oppose it. If there is to be a linkage mechanism, it should be done using a new ttm: attribute.
Received on Friday, 8 August 2014 09:08:23 UTC

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